SDF, or sodium diamine fluoride is a liquid antimicrobial that is applied at the dental office to stop the progression of small cavities. It is a conservative approach to managing dental decay. When applied to a cavity, it can remineralize, or strengthen the cavitated tooth structure. The procedure only takes a few minutes. It’s quick, and doesn’t require any anesthetic.

Frequently Asked Questions

What situations may SDF be recommended For?

Although we usually manage cavities by removing the decay, and placing fillings, it’s not always possible. These are some situations that may benefit from the use of SDF:

  • for patients with many cavities that can’t be restored right away
  • when there are behavioural, physical, or medical challenges that may prevent getting other dental procedures done
  • when there are barriers to accessing dental care
  • for cavities that are difficult to treat

Can SDF be applied to all cavities?

SDF is used to control early cavities. SDF is not used for very deep cavities that are close to the innermost layer of the tooth (also known as the pulp), or if the tooth is painful. We also avoid using it where esthetics is a concern. 

Are there any side effects?

The main side effect is that SDF leaves a brown or black stain when it is applied to dental decay. However, it doesn’t stain healthy, sound enamel. 

SDF should not be used on patients with silver allergies, or certain gum and soft tissue conditions.

Is SDF the same as THE fluoride that is Typically applied at the end of cleaning appointments?

No, SDF is different from the topical fluoride treatment you routinely get at dental cleaning appointments. The type of fluoride used at hygiene appointments is mainly aimed at preventing future cavities, not arresting existing ones. That type of fluoride does not leave a stain. 

Still have questions?  Contact Vivant Dental in Surrey today.

Here are the detailed instructions for making a fabric mask with a filter pocket! Following these steps, we were able to create more than 100 fabric masks for our community during the COVID-19 closure. Why did we make these? It is believed that a fabric mask may play a role reducing the spread of the virus in the community. We wanted to do our part in helping to “flatten the curve”. 

Please note that fabric masks are not equivalent to surgical or N-95 masks, and they are not a substitute for social distancing or proper hand hygiene. We strongly encourage you to follow the Government of Canada’s recommendations on the proper use of any fabric mask.

Tools you'll need

  • scissors
  • ruler
  • sewing machine (needle and thread)
  • clips
  • iron & ironing board
  • fabric marker pen

Fabric mask components

  • Four 18” x 1 ½” strips
  • Front piece (100% cotton; 9” x 7 ½”)
  • Back piece (100% cotton; 9” x 6 ½”)

We’re making a mask that’s white at the front.

Fabric components for fabric mask

Some General Tips First!

Always backstitch.

Choose different fabric patterns for the front and back of the mask to easily tell them apart.

To make your own ties from fabric:

Mask tie of Fabric Mask

You’ll need 4 pieces of fabric like this (~18” x 1 ½”)

Fabric Mask tie

Fold ¼” on one side and iron flat to create a finished end (that won’t fray).

Fabric Mask tie

Fold both long sides towards the centre, and iron flat.

Fabric Mask tie

Fold in half to encase the raw edges. Iron flat.

Fabric Mask tie

Once ironed, it should look like this.

Fabric Mask tie

Sew a straight line down the entire length of the strip (~1/8” from the edge). You’ve completed one tie! You’ll need four of these.

Assemble the fabric components

Fabric Mask Assembly

Line up one long edge of the two pieces of fabric.  

IMPORTANT: The patterned sides of the fabric should be facing each other.

Fabric Mask Assembly

Sew two 3” lines about ¼” away from the lined-up edge. Leave a 3” gap between the lines.

Fabric Mask Assembly

Optional: Iron open the seam and sew straight down the middle of each of the two flaps. This increases durability!

Fabric Mask Assembly

It should look like this on the patterned side.

Fabric Mask Assembly

Line up and clip the other long edge with the patterned sides of the fabric facing together.

Fabric Mask Assembly

Sew a line ¼” away from this edge all the way across.

Fabric Mask Assembly

Knot each tie on itself to shorten it.

Fabric Mask Assembly

Line up and clip the unfinished end of the tie to each of the four corners on the inside. Position the ties so that they are not visible from the outside.

Fabric Mask Assembly

For illustrative purposes only, the ties in the photo are placed on top of the fabric so you can see how they should be aligned at the corners. 

Do NOT place your ties above the fabric. They need to be inside, as shown before.

Fabric Mask Assembly

It should look like this.

Fabric Mask Assembly

Sew two lines that are ½” away from the open edges. Tip: If you are using a machine, sew slowly, and manually turn the wheel due to the added thickness of the ties.

Fabric Mask Assembly

Flip the package inside out through the 3” gap between the two 3” long stitch lines.

Fabric Mask Assembly

Pull on the straps to straighten the mask. 

Tip: Iron the mask to make the edges sharper and easier to pleat.

Fabric Mask Assembly

Position the mask with the filter opening visible. Fold and clip three ~9/16” pleats, with the pleats pointing up.  Total height of the mask after pleating: ~ 2½”.

Fabric Mask Assembly

Sew two lines, each ¼” away from the short edge. If your machine is encountering resistance, try going slowly and manually turning the wheel.


Fabric Mask Assembly

Voila! This is the back of the completed mask.

Fabric Mask Instructions by Vivant Dental

This is the front of the mask.

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